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The data randomizing part has an 18-round Feistel structure with FL/FL-1 function layers after the 6-th and 12-th rounds and 128-bits XOR operations before the first round and after the last round.
Because of its high speed, parallel processing, no special requirements for the structure of the processor in realizing and the alterative block length，The AES algorithm has a good scalability.
Jónsson, in: Theoretical Methods in Condencsed Phase Chemistry, edited by S.D.
Schwartz, volume 5 of Progress in Theoretical Chemistry and Physics, chapter, 10, Kluwer Academic Publishers (2000)

Mg(OH)2 crystals belong to typical CdI2 layered structure and belong to the hexagonal system, and the polarity along the [001] direction is stronger while the polarity along the [001] direction is weak[11].
Nanoscale Magnesium hydroxide and magnesium oxide powder: control over size, shape, and structure via hydrothermal synthesis[J].
Chemistry of marerials, 2001,13(2):435-440
Chinese Journal of Inorganic Chemistry, 2008, 24(4): 665-669

Results and Discussion As there are wide varieties of species in Huan River, different section may has different species and the shape as well structure of different fish are distinct.
While Zn and Pb content in parabotia fasciata, roe is slightly lower than muscle, which maybe related to its gonadal structure and living habits, remains to be turned over.
Heavy metal levels in two fish species Leuciscus cephalus and Lepomis gibbosus[J].Food Chemistry.2007,100(2): 830–835
[9] Z.h.Lei, X.Q.Xu, et.Studies on the characteristics of ecological chemistry of microelements in fish[J].ACTA HYDROBIOLOGICA SINICA,1994,18（4）：309-315.

The conglomerate reservoir is provided with strong heterogeneity and complex pore structure.
Introduction Compared with sandstone reservoirs, conglomerate reservoir with features of complex structure and uneven distribution of pore[1,2], small diameter of throat and big throat to pore ratio has bad physical property.
Microscopic Mechanisms of Oil Displacement by Polymer Solution for Conglomerate Reservoir[J].Oilfield Chemistry,2007,24(3):232-237

The chemical structure of hydrocarbon groups most compatible with PP was determined by calculation using the Cascade computer program (INEOS RAS).
The structure and a several properties of basalt fibers are considered in a number of works.
Artemenko, Fiber Chemistry. 3 (35) (2003) 226

Al loading and calcination temperature played significant roles in the absorbents structures and adsorption capacities.
Mesoporous silica materials with regular arrays of uniformly sized channels have attracted widespread interest in many areas of chemistry and material science [5].
The effects of calcinate temperature and aluminum content on absorbent structure and absorption capacity were investigated in detail.
The highly ordered mesoporous MCM-41 was synthesized by using CTAB and TEOS as a structure-directing agent and an silicon source, respectively.
After modification of MCM-41 with Al, the well-ordered hexagonal mesoporous structure of MCM-41 was preserved even at higher Al loading.

Optical microscopy with Nomarski diffractive interference contrast and atomic force microscopy (AFM) in tapping mode were used to study surface morphology and surface step structure.
Van der Pauw device structures were also made through lithographic ohmic contacts of Ti/Au 300/700 Å.
Graphene thickness is quite uniform over large terraces and a well defined pattern corresponding to the surface step structure is observed on the surface.
Hence, we attribute the better graphene morphology observed on the etched substrate to the presence of a well-defined surface step structure formed during in-situ surface preparation.
The fine surface step structure formed during in-situ etching was replaced with large steps due to step-bunching during graphene growth.

Understanding the deformation mechanisms of material's internal structure, shape and volume is a key step to enhance its strength and rigidity.
Therefore, MD simulation allows to gain understanding in structure-to-function relationships involved in the low-dimensional materials.
SiNTs are nanoparticles which develop a tubular structure from silicon atoms [32].
Fang, Tensile Deformation of Tubular Structures of Nitride-based Nanotubes: Brittle and Weak Behavior, Tamkang J. of Sc.
Tersoff, Modeling solid-state chemistry: Interatomic potentials for multicomponent systems, Phys.

This low C/S ratio affects the C-S-H layer structure and has a significant effect on the mechanical properties.
C S H has a disordered layer structure akin to a tobermorite structure lacking some of the bridging tetrahedra.
Taylor, H.F.W., Cement chemistry. 2nd ed. 1997, London: Thomas Telford. xviii, 459 p. 2.
Materials and Structures, 2011. 44(1): p. 13-28. 7.
Merlino S.; Bonaccorsi E, A.T., Tobermorites : their rela structure and OD character. .

Recently, the site-isolating effect of the dendritic structure on the core [2] and the light-harvesting ability have been studied extensively.
Scheme 2 Chemical structure of ZnQ2-containing dendrimer 6 and 7 Results and discussion Fluorescence of dendritic 8-hydroxyquinoline ligands 4 and 5.
The results indicate that antenna effect of the dendritic structure will increase the fluorescence intensity of core 1.
The results validate that the site-isolating effect of the dendritic structure on the core can increase the fluorescence intensity.
Peng, Synthesis and photophysical caracterization of the free-radical copolymerization of metaloquinolate-pendant monomers with methyl methacrylate, Journal of Polymer Science: Part A: Polymer Chemistry 43(2005) 397-406.